import React, { useEffect, useState } from 'react'
import Item from './Item'
import PubSub from 'pubsub-js'
export default function List() {
  //初始化一个state 保存订阅回来的数据,当订阅回来以后,数据改变,视图重新渲染
  const [searchList, setSearchList] = useState({ isInit: true, isSearch: false, data: [] });
  //初始化订阅
  useEffect(() => {
    PubSub.subscribe('github', (_, data) => {
      //console.log(data);
      //获取到订阅的值 放入state中
      setSearchList(data)
    })
  }, [])
  return (
    <div className="row">
      {
        searchList.isInit ? <h2>请开始搜索</h2 > :
          searchList.isSearch ? <h2>正在搜索中....</h2> :
            searchList.data.map(item => {
              return <Item key={item.id} {...item} />
            })
      }
    </div>
  )
}
